import java.io.FileNotFoundException;
import java.io.PrintStream;

/**
 * @Author: WangYongGan
 * @Date: 2021/11/18 20:05
 * @Description:
 */
public class systemout {
    public static void main(String[] args) throws FileNotFoundException {
        System.setErr(new PrintStream("error.txt"));
        System.err.println("aaaa");
        String a="A.\t外表颜色为天蓝色、瓶上的字样颜色为黑色";
    }
}
